66 odometer test
I was just reading through the TD this morning and came across this post.
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March 30th, 2013, 10:42 AM#21
Dick Whittington (8804)
Re: Odometer roll back
Originally Posted by Joe Ciaravino (32899)
C4 Corvettes, and probably all other cars of the era use a thin mylar tie-bar instead of the old inking. The tie-bar is perforated in 5 places, attaches a lug on each of the tumbler drums, and keeps all of the tumbler drums aligned. If the odo is run backwards, the mylar tie-bar breaks and the tumblers become misaligned, resulting in the numbers in total disarray.
I don't see how it's possible to tamper with a C4 odo, including R & R in under an hour.
There is a similar tie bar on your mid year. You can take the needle type tools I referenced and manipulate the numbers on the drum. There used to be many masters that could do this before you blinked your eyes. I saw a set of those needles a few months ago. If I can run up with the guy that owns them, I will make a photo and post it................................................ .................................................. .................................................. .................................................. .................................................. ..........................................
So now I am afraid I might have done something wrong in regard to my odemeter . When I removed my cluster several years back ,I did indeed roll the odometer back to zero ,as I assumed it was understood that it was going to be a complete frame off resto and therefore allowed.
I truley don't remember how I did it , but I assume I just rolled it back by spinning the gear . I am QUITE CERTAIN I didn't use any needles or special tools ! Now based on Dick's comment about there being a "Tie Bar" on it , I am wondering if I broke it by doing so , and more importantly, that it won't work properly again !
I surely don't want to find out after I install the cluster . So my question is : How do I find out if I broke it , or if it will work correctly again before I install the whole cluster back in the car ?
One step forward , two steps back !
Jim
Reply Reply With Quote March 30th, 2013, 10:42 AM#21
Re: Odometer roll back Originally Posted by Joe Ciaravino (32899)C4 Corvettes, and probably all other cars of the era use a thin mylar tie-bar instead of the old inking. The tie-bar is perforated in 5 places, attaches a lug on each of the tumbler drums, and keeps all of the tumbler drums aligned. If the odo is run backwards, the mylar tie-bar breaks and the tumblers become misaligned, resulting in the numbers in total disarray.
I don't see how it's possible to tamper with a C4 odo, including R & R in under an hour.
There is a similar tie bar on your mid year. You can take the needle type tools I referenced and manipulate the numbers on the drum. There used to be many masters that could do this before you blinked your eyes. I saw a set of those needles a few months ago. If I can run up with the guy that owns them, I will make a photo and post it................................................ .................................................. .................................................. .................................................. .................................................. ..........................................
So now I am afraid I might have done something wrong in regard to my odemeter . When I removed my cluster several years back ,I did indeed roll the odometer back to zero ,as I assumed it was understood that it was going to be a complete frame off resto and therefore allowed.
I truley don't remember how I did it , but I assume I just rolled it back by spinning the gear . I am QUITE CERTAIN I didn't use any needles or special tools ! Now based on Dick's comment about there being a "Tie Bar" on it , I am wondering if I broke it by doing so , and more importantly, that it won't work properly again !
I surely don't want to find out after I install the cluster . So my question is : How do I find out if I broke it , or if it will work correctly again before I install the whole cluster back in the car ?
One step forward , two steps back !
Jim
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